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Rice (Oryza sativa L.) is one of the major food crops of the world. It is staple food for more than 60% of the global population and forms the cheapest source of food and energy (Zhao et al., 2011). Besides being the chief source of carbohydrate and protein in Asia, it also provides minerals and fibre. The present world population of 6.3 billion which may reach 8.5 billion by 2030 with an approximate rice consumers of five billion people thereby, increasing the demand of rice up to 38% by 2030. To meet this challenge there is a need to develop rice varieties with higher yield potential and greater yield stability (Lea and Miflin, 2003).

Mean Performance of Nitrogen Use Efficiency and Grain Yield in Rice Genotypes